400
Number 400 properties
- 400 is an even number.
- 400 is a perfect square (20 × 20).
- 400 is a Harshad number, which means it is divisible by the sum of its digits (400 = 4, and 400 is divisible by 4).
Number 400 - properties and curiosities
400 (number)
Prime factorization
Prime factorization of 400: 2^4 × 5^2.
Divisors
Divisor count: 15
1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400
Factors of 400 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400.
Representations
In octal, 400 is represented as 620.
In binary, 400 is represented as 110010000.
In hex, 400 is represented as 190.
Roman numeral: CD
Curiosities
- 400 is a perfect square, so it forms a square grid with equal side lengths.
- 400 is divisible by the sum of its digits.
Related numbers
Quick answers
Is 400 prime?
No, 400 is not prime.
What are the factors of 400?
1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400
What is 400 in binary?
110010000